Dentist s lathe
US 399406 A
Description (OCR text may contain errors)
, NfW. HOLT.
No. 399.406, Patented Mar. 12, 1889.
WI'I'NBEEE-Ei T L m H w N n T w E N UNITED STATES PATENT @FFICE.
NEAVTON XV. HOLT, OF BENNING'ITON, VERMOXT.
SPECIFICATION forming part of Letters Patent No. 399,406, dated March 12, 1889.
Application filed Angus. 22, 1888.
1'0 (EZZ 10. mm it may cancer/1.
Be it known that I, Nnw'rox \Y. Hour, of )ennington, county oi Benningtcm, and State of Vermont, have invented certain lmprovements in Dentists Lathes, of which the following dcscriptiomin connection with the accon'ipanying single sheet of drawings, constitutes a specification.
My invention cons'ts in certain improvements in rotating heads for dentists lathes and in the appliances connected therewith for driving the radial spindles attached thereto, all of which is fully shown in the drawings accompanyin this specification, wherein In Figure l I have shown a partial vertical section taken through the perpendicular axis of the machine, and in Fig. 2 is shown an inverted plan view of my improved rotating head. i
My invention consists of a standard, B, y erected on a base-plate, S, which is perforated, l
as at G, for the passage of the driving-belt. The top of standard if; is turned up, so as to leave the stud .l, upon which the dome-shaped shell A revolves. When in place, the shell is 1 confined by the flanged screw-bolt M. The bottom rim of the dome A has a series of radial hubs, R R R, east thereon,which are bored for the reception of spindles, as seen at D, Fig. 1. Each spindle carries a diiierent kind of ani1n )lementsuch,for instance, as circnl lar brushes, emery-wheels, polisliingavheels, drills, &c. Upon the inner end of each spindle is the clutch-disk ll,which carries a clutchpin, (l. The other member of the clutch consists of the pulley P, which revolves on a stud, V, which projects from standard B and is in line with the axis of spindle D.
The hub of i Flerial No. 283,503. (No model.)
pulley I is provided with clutch-pin (",which is adapted to engage with pin 0 whenever the dome A is revolved, so as to bring a spindle in line with theaxis oi pulley l. The dome A has recesses K cut in ilsbottom edge at regular intervals, into which the springbolt L latches to hold the dome stationary.
The base-plate S may be screwed or fastened to any ordinary bench, table, or stand, and the pulley can be driven by a belt or cord from another pulley beneath.
I claim as my invention-- 1. The horizontal circular lathe-head A, pro vided with radial spindles seated in radial hearings in the edge of the rim of the head, each carrying on its inner end one member of a clutch, in combination with a drivingpulley, and the other member of said clutch pivoted on the column upon which the head revolves, the spindles being arranged so that by revolving the head their axes may successively be brought into line with the axis of the driving-pulley, substantially as specified.
2. The combination of standard A, carrying clutch-pulley P, pivoted, as shown, with the revolving head A, carrying a series of radial spindles, each of which carries a clutch memi her to co-operate with the pulley-clutch, and
the latch-bolt L, for locking the head in any desired position, substantially as shown, and for the purposes set forth.
In testimony whereof I have hereto subscribed. my name, at Bennington, Vermont, this 23d day of July, A. D. 1888.
XEXVTOX ll". HOLT.
In presence o- FRANKLIN Scorr, E. H. WoRrr'nNoroN.